Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Giant Sulphur
Colias gigantea Strecker, 1900

Family: Pieridae
Subfamily: Coliadinae
Identification: Upper surface of male yellow with narrow black borders; lower surface without submarginal black spots. Female with 2 forms, yellow or white; both may have black border reduced or lacking.
Wing Span: 2 - 2 3/4 inches (5.1 - 7 cm).
Life History: Third-stage caterpillars overwinter.
Flight: One flight from June-July.
Caterpillar Hosts: Dwarf willow (Salix reticulata).
Adult Food: Flower nectar.
Habitat: Willow bogs.
Range: Alaska south along Rocky Mountains to Wyoming.
Conservation: Not usually required.
NCGR: G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery.
Management Needs: Not reported.
Comments: NULL